National Eggnog Day is the day before Christmas, Christmas Eve. Known as egg milk punch, eggnog is a very popular drink during the holidays. A sweetened dairy based beverage that is traditionally made with milk & cream, sugar, whipped eggs & spices. Served at parties & holiday get togethers, liquor is often added, such as brandy, rum, whiskey, bourbon, vodka or a combination of liquors. The glass is typically garnished with a sprinkle of cinnamon, nutmeg or pumpkin spice.